Burj without question. It's superior in most categories. Stayed at both hotels in 2013 and while Burj is too touristy and the rooms are not my style Srmani had terrible service, it felt claustrophobic, suite was not nice (dark, felt small) and so on. Burj has also good facilities (nice pools, beach, Aal Wadi if you like), Armani has more or less only a mediocre pool.